Dental instrument.



"0. F. LAUDERDALE.

DENTAL INSTRUMENT.

APPLICATION FILED AUG. 15, 1910.

990,277. Patented Afpr. 25.1911.

' (Zgzklj ad /1;

%WM a0 I Attorneys Inventor T all whom it may concern:

Be it known that/I, CHAPIN I LAUDER CHAPIN F. LA D RDALE, onhmrolvsxomo.

DENTAL ms'rnomniw r Specification of Letters Patent. ,Batentetl A pra25, 19 l 1 Application filed au ustis, 1910,,'ser tet'zz szf' V DALE, a citizen of theUnited States, residing at Lyons, in the county of Fulton and State of Ohio, have invented a new and useful Dental Instrument, of which the following is a specification.

The device'whieh' is the subject of the present invention is designed to be used in dental operations for depressingthe tongue, cheek and lips of the patient, where a free and through exposure of the posteriorteeth is wanted; and it is the object of the invention to provide an ellicient and easily han-- died device of this character, and also to combine with the same a water dropper for inoistening the bur or grindingwheel when the saine is in operation, the application of water to the burdissipatingr the heat gen erated thereby,,an d increasing its cutting capacity.

The invention is illustrated in the accompanying drawing forming a part of this specification, in which Figure l is a perspective view of the A device. Figs. 2 and 3 are. edge views taken from dill'erent'sides. I 7

Thedevice is formed of some suitable thin metal, and, as shown in the drawing, coinprises a handle portion owhich is shaped similar to the bowl of a spoon, and -from which extends a shank (I ha ring a peculiarly shaped terminal portion to adapt the same to the mouth of the patient, and which terminal portion is employed to depress the tongue, cheek and lip of the patient during, the dental o 'ieration. 'lhe shank is concave-convex in cross section, the concave portion being on-the same side ot the device as the concave portion of the handle, and forming a continuatii'iii thereof.

At the extremity of the shank (i is a laterally curved portion 7 terminating in a for- Ward curve 8. The parts 7 and 8,-at their junction, are reduced, as indicated at 9, thus forming a recess 10 on one side of the device, which recess is for av purpose to be presently described, and which, by reason of the lateral bend 7, is offset from one side of the shank (3, the bend being from the convex side of the shank. The edges of the recess are without sharp corners, the latter being avoided'by curves The parts 7 and 8 are V shaped so thatthey may be placed'in the I mouth of thefpatient )Vi'bh a amount of discomfort, they being madeconcave-convex in cross section, and the convex sides being onthe same side of thefdevice as the convex sides of the handle andthe shank. iThe parts'7 and,8, jvhen the device is in use, serve tofdep'ress the to ngue, cheek and lip of the patient, and the recess 10 i'en d ers the tooth to operated on more readily accessibl The water dropper comprises a rubber bulb 11, of ordinary construct-ion,provided with a discharge tube 12 terminating in a laterallycurved tipl3. The bulb 'liesin the concave portion of the handle 5, and the tube extends along the concave side fof the" shank, and terminates adjacent to the re-' cess, so .that the water inay bediseharged 'therethroughi onto the bur, The "dropper is held in place 'by means of-a sleevelt formed on the shank 6, through which sleeve the tube 12 loosely' 'iasses, so that the'd'ropper may be removed if desired, and also adjusted aswill he presently described,

The device can he used'forsany. dental operation where avfree and thorough exposure of the posterior teeth is wanted, the

tongue. cheek and lip of the patient being readily depressed by the parts. 7 and 8. The water dropper p'rovules a handy and convenient means for applying water tothe bur for dissipatingthe heat ,igenerated thereby, \\'hich materially increases its cutting eaiacity. p I The device willhe highly'polished'so as to act as a. rellectorjto eoncel'itratc the light on the tooth to be operated on.

'lhe spoon shaped handle renders the device easy to control, and also protects the bulb, preventing the water from being ejected hetore wanted. The curved tip of the tube 12 llHlYllQl'OttlllCd, orshpped back and forth to allow the water heing dropped on any spot desired.- V

The handle is o|ned to the retractor at .an angle which lCtlllll'tS- simply a rotary motion of the handle to concentrate the light on any desired place. a

The device can he held with a straight and uncrainped wrist, the fore-arm resting on the head rest at the side of the p atients head. in practice the device will he made for entrance at the right, or left corner of' vthe mouth. I

1-. A dental instrument comprising a ban die, and a shank terminating in a laterally curved and enlarged portion which is conjcavorconvex in cross section.

2. A dental Instrument comprising a handle, and a shank terminating ina laterally curved and enlarged portion, the handle and shank being concave-convex in cross section, 10'

cross section, and termlnat-in in a laterally curved and enlarged portion 1avinga recess in one of its edges, ,and a fluid dropper comprising a bulb mounted in the concavity of the handle, and having an outlet tube extending along the shank in the concave porthe recess-to discharge therethrough.-

die, a shank extending therefrom and ternnnatang 111 a laterally curved and enlarged portion having a recess lnone 01. its edges,

on the handle, and having a' discharge tube adjacent to the recess to discharge there through, said tube being rota-table and longitudinally adjustable with respect to the shanlc.

ture in the presence of two WiiDQ-SSGS. v CHAPIN F. LAUDERDALE. 1

\Vitnesses C. B. SLATER,

D. S. BAKER.

tion thereof and terminating adjacent to I 4. A dental instrument coinprisinga han-' a Water dropper comprising a' bulb mounted e v I extending along the shank, and termlnatlng Y In testimony that Iclaim the foregoingas. my own, I have hereto affixed my signa- V 

